The definition of the q algorithm is found at http://www.aprs-is.net/q.aspx
The 92E5A2B6 and A55B8C1C are the IP addresses from where the packet was received (146.229.162.182 (THIRD) and 165.91.140.28 (FIRST)) by a server. This is because a server doesn't know the callsign-SSID of the server they are connected to (just like a client doesn't know the callsign-SSID of the server it is connected to). This is a limitation of the original APRS-IS design and how the q algorithm accounts for it.
73,
Pete Loveall AE5PL
pete at ae5pl dot net
> -----Original Message-----
> From: Keith VE7GDH
> Sent: Saturday, May 03, 2008 9:06 PM
> To: TAPR APRS Mailing List
> Subject: [aprssig] path from IGate to server(s)...
>> 2008-05-03 18:42:09 PDT:
> VE7BGB>APD225,TCPIP*,qAI,VE7BGB,THIRD,92E5A2B6,FIRST,A55B8C1C,T2FINLAND
> :!5207.84NI12207.16W& Williams Lake Embedded IGate
>> Other than being connected to THIRD instead of a Tier 2 server, the
> first part (qAI,VE7BGB,THIRD) looks pretty normal but I don't really
> understand the second part. Can anyone explain it?
>> 92E5A2B6,FIRST,A55B8C1C,T2FINLAND